Catalysis (Section)Heterogeneous catalysts that perform hydrogenation reactions, as illust...

Catalysis (Section)

Heterogeneous catalysts that perform hydrogenation reactions, as illustrated in Figure, are subject to “poisoning,” which shuts down their catalytic ability. Compounds of sulfur are often poisons. Suggest a mechanism by which such compounds might act as poisons.

Figure Heterogeneous catalysis. Mechanism for reaction of ethylene with hydrogen on a catalytic surface.